Suction pump means having longitudinally divided suction tubes



April 21, 1.964

G. S. M lT.TELSTAEDT SUCTION PUMP MEANS HAVING LONGITUDINALLY DIVIDED SUCTION TUBES Filed Feb. 26, 1962 F I G.

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m m m United States Patent() 3,129,873 SUCTION PUMP MEANS HAVING LONGITUDI- NALLY DIVIDED SUCTION TUBES Georg S. Mittelstaedt, 274 73rd St., Brooklyn, N.Y. Filed Feb. 26, 1962, Ser. No. 175,471 8 Claims. (Cl. 230-92) This invention relates to suction means, including suction pumps, and relates particularly to the specific construction of the suction device, that is, the conduit or flow tube and the suction tube associated therewith. The device is capable of independent use, separate and apart from any specific use or any specific source of fluid through the conduit, and may be used wherever suction devices are employed. For instance, the suction device may be used in connection with jet engines and other combustion devices, it may be used in combination with any intake or exhaust means, with spray, draining, and draft devices, with aeration devices and other combining devices, to drive turbines or other apparatus, and wherever suction flow is utilized.

Objects of this invention are: to provide a suction pump in connection with fluid flow, to increase the efliciency of suction devices, to improve suction tubes, to improve suction pumps, to produce suction flow, to augment suction flow, to augment flow in the conduit down stream of the suction pump, to increase the efiective total momentum of fluid, to increase the effective total momentum of fluid discharged in unit time, to increase thrust, to increase power, to utilize the suction flow to secure a cooling effect, to drive a turbine, to provide a cool running turbine, simplicity of construction, installation, and maintenance, and low cost.

These and other objects will become apparent in the description below, in which characters of reference refer to like-named parts in the drawing.

The drawing shows sectional views illustrating the invention, but the invention is not limited to the particular examples illustrated.

FIGURE 1 is a longitudinal sectional view of a conduit and a longitudinally partitioned suction tube extending across the conduit, showing the suction tube on one side of the partition, where a channel leads from a suction opening to one end of the suction tube.

FIGURE 2 is the other side of FIGURE 1, showing the suction tube on the other side of the partition, where a channel leads from a suction opening to the other end of the suction tube.

FIGURE 3 is a transverse sectional view of the device.

FIGURE 4 also is a transverse sectional view, similar to FIGURE 3, and is taken on the lines 44 of FIG- URES 1 and 2.

FIGURE 5 is a transverse sectional view similar to FIGURE 4, and shows separate tubes leading from separate suction openings to opposite ends of the suction tube.

FIGURE 6 is a transverse sectional top plan view of the device, taken on the line 6-6 of FIGURE 4.

Referring in detail to the drawing, the numeral 10 indicates a conduit or flow tube, and 11 indicates a suction tube extending across the flow tube at right angles to the axis thereof. The suction tube is open at both ends and has a peripheral or perimetric opening 13. The numeral 12 indicates welds or other fastening means, and the arrows in the tubes indicate the direction of flow. The flow tube and suction tube are the straight line wall type. The suction tube diverges and then converges transversally, and a constriction of flow is produced which increases to the diameter of the suction tube, and then decreases. Velocity increases and decreases in proportion to constriction of flow. The suction opening 13 preferably begins immediately downstream of the greatest constriction of flow and extends toward the rear portion of the suction tube. A longitudinal partition 14 is provided in the suction tube, dividing the tube and the peripheral or perimetric opening, and forming two separate suction openings and two separate channels 15 and 16. The channels are closed on opposite ends, and the numerals 17 and 18 in FIGURE 3 indicate the closing means. The channels may also be closed immediately beyond the suction openings as indicated by broken lines 19 and 20. In any case, the channels 15 and 16 are so arranged that separate channels lead from separate suction openings to opposite ends of the suction tube.

Since pressure is reduced accompanying increase of velocity, a low pressure area is produced, and air or other fluid is drawn through both ends of the suction tube into the flow tube.

The numeral 21 indicates a flat body or fin disposed longitudinally in the flow tube. This flat body is mounted on the outside of the suction tube, between the suction openings, or it may extend to the wall of the flow tube and may be attached thereto. The fin 21 reduces turbulence at the opening 13. The suction opening 13 may be formed by cutting away or otherwise eliminating all or part of the wall of the suction tube downstream of the greatest constriction of flow. The suction tube may also be cast or otherwise made with corresponding openings. The openings may be of any character, shape, or form, and in the text and claims, by opening is also meant plural openings, including slits, perforations, pores, or any other type opening. The wall portion of the suction tube toward the flow may be streamlined, or be equipped with a fairing, and this is part of this invention.

FIGURE 4 shows the partition 14 so arrangedthat the channels 15 and 16 expand outward to the width of the suction tube. This increases suction flow.

It is part of this invention to run tubes of any kind from separate suction openings to opposite ends of the suction tube, and FIGURE 5 shows tubes 23 and 24 leading from separate suction tube openings to opposite ends of the suction tube. Again, the numeral 21 indicates a Lfin.7!

FIGURE 6 is a transverse sectional view taken on the line 6-6 of FIGURE 4, where 10 indicates the flow tube, 11 the suction tube, 13 the suction opening, and where the numeral 14 indicates the partition which divides the suction tube and the suction opening longitudinally.

The suction tube may be fastened to the conduit by any suitable means such as Welding, soldering, bolting, cementing, screwing etc.; or a fitting may be made comprising a representative portion of the conduit and the described suction tube extending thereinto, the fitting being inserted in the conduit or attached thereto by any suitable means. Such means include unions or other coupling means, cementing, soldering, welding etc. The broken lines 25 and 26 in FIGURE 1 indicate the insertion of the fitting in the conduit.

Examples of practical applications of the invention are:

(1) Drainage pumps, where the defined suction tube communicates with useless water. (2) Aeration devices, where the defined suction tube communicates with air or other gas. (3) Mixing devices, where the defined suction tube communicates with selective mixing fluid. (4) Spray devices, where the suction means and a suitable nozzle are disposed at the end of the hose or conduit, and where the defined suction tube communicates with fluid material used in the spray. (5) Exhaust aeration pumps for piston type combustion engines, where the device is inserted in the exhaust line or attached to the end of the tail pipe, and where the defined suction tube communicates with air.

(6) Suction pumps for jet engines, where the defined suction tube may extend ((1) across the air intake duct, (b) across the burner or ducted burner, preferably at a point where high velocity has been reached, across the exhaust tube of a combustion chamber, (d) across the exhaust nozzle. (7) Suction pump according to Example 6, where the suction tube is connected with turbine means, the turbine means to compressor means, and where a duct is provided conveying the compressed air to the combustion chamber. Fuel means and perhaps ignition means may be provided in an optional manner.

I illustrate a conduit and suction tube of the straight .line wall type, and I show the suction tube extending into the conduit at right angles to the axis thereof; but

any other suitable type conduit or suction tube, and any other type of extension or angular inclination may be employed.

Suction effect augmenters may be used in connection with the suction tubes. The augmenters may comprise enlarged mouths at the outer end of the suction tubes.

In the text and claims, by tubes of the straight line wall type is meant this type at the aspiration point; by tube is also meant duct, channel, passage; by suction tube is meant any tube which conveys suction flow,

also in part; by conduit or flow tube is also meant channel, duct, passage ducted burner, exhaust tube, exhaust nozzle; by fluid is meant any substance which is capable of flowing, as a liquid, a gas, or readily mova ble solids; by upstream side or downstream side of the suction tube is meant in relation to the flow through the flow tube.

The principles involved in this invention may be applied to all fields of fluid flow, as related to suction.

Changes in form and construction may be made without departing from the spirit or scope of the invention.

I claim:

1. Suction pump means comprising a flow tube, an open-ended suction tube extending across the flow tube, the ends of the suction tube extending at least to the outside of the flow tube, said suction tube producing in the flow tube an increasing-decreasing constriction of flow, an opening in the wall of the suction tube downstream of the greatest constriction of flow, and a longitudinal partition dividing the suction tube and dividing said opening, providing sidewise arranged, separate peripheral openings in the suction tube, said partition with the suction tube forming channels in the suction tube leading from said separate peripheral openings to opposite ends of the suction tube; said constriction of flow producing a low pressure area, resulting in fluid being drawn through the suction tube into the flow tube.

2. Suction pump means comprising a flow tube, an open-ended suction tube extending across the flow tube, the ends of the suction tube extending at least to the outside of the flow tube, said suction tube producing in the how tube an increasing-decreasing constriction of flow, sidewise arranged separate openings in the wall of the suction tube downstream of the greatest constriction of flow, and means providing separate channels in the suction tube leading from said separate wall openings to opposite ends of the suction tube; said constriction of flow producing a low pressure area, resulting in fluid being drawn through the suction tube into the flow tube.

3. In suction pump means comprising a flow tube and an open-ended suction tube extending across the flow tube, the ends of the suction tube extending at least to the outside of the flow tube and the suction tube producing in the flow tube an increasing-decreasing constriction of flow, a longitudinal partition in the suction tube disposed lengthwise to the direction of flow through the flow tube, and peripheral openings in the suction tube on both sides of the longitudinal partition downstream of the greatest constriction of flow, said partition with the suction tube forming separate channels leading from said separate peripheral openings to separate ends of the suction tube; said constriction of flow producing a low pressure area, resulting in fluid being drawn through the suction tube into the flow tube.

4. In suction pump means comprising a flow tube, an open-ended suction tube extending across the flow tube and through the wall thereof so that the ends of the suction tube open exteriorly of the flow tube, said suction tube producing in the flow tube an increasing-decreasing constriction of flow, and longitudinal partition means disposed in the suction tube lengthwise to the axis of the flow tube, perimetric openings in the suction tube on both sides of the longitudinal partition means downstream of the greatest constriction of flow; said partition means with the suction tube forming separate channels connecting from separate perimetric openings with separate ends of the suction tube, said constriction of how producing a low pressure area, resulting in fluid being drawn through the suction tube into the flow tube.

5. In suction pump means comprising a flow tube,

an open ended suction tube extending across the flow tube and extending with its ends at least to the outside of the flow tube, said suction tube producing in the flow tube an increasing-decreasing constriction of flow, and

sidewise arranged peripheral openings disposed in the suction tube downstream of the greatest constriction of flow, longitudinal partition means in the suction tube extending between the peripheral openings; said partition means with the suction tube forming separate channels leading from said separate peripheral openings to sepa rate ends of the suction tube; said constriction of flow producing a low pressure area, resulting in fluid being drawn through the suction tube into the flow tube.

6. In suction pump means comprising a flow tube and an open-ended suction tube extending across the flow tube through the wall thereof so that the ends of the suction tube open exteriorly of the flow tube, sidewise arranged separate perimetric openings in the suction tube on the downstream side thereof, and means forming sepa rate channels in the suction tube leading from said separate perimetric openings to opposite ends of the suction tube.

7. In suction pump means comprising a flow tube, an open-ended suction tube extending across the flow tube through the wall thereof so that the ends of the suction tube open exteriorly of the flow tube, sidewise arranged peripheral openings in the suction tube on the downstream side thereof, and means forming separate channels in the suction tube connecting said separate peripheral openings with separate ends of the suction tube, a fin disposed between the peripheral openings outside the suction tube and extending longitudinally into the flow tube.

8. Suction pump means comprising a flow tube, an open-ended suction tube extending across the flow tube through the wall thereof so that the ends of the suction tube open exteriorly of the flow tube, sidewise arranged peripheral openings in the suction tube on the downstream side thereof, and means forming separate channels in the suction tube leading from separate peripheral openings to separate ends of the suction tube, said channels being expanded outwardly toward the ends of the suction tube.

References Cited in the file of this patent UNITED STATES PATENTS 2,230,004 Morgan Jan. 28, 1941 

1. SUCTION PUMP MEANS COMPRISING A FLOW TUBE, AN OPEN-ENDED SUCTION TUBE EXTENDING ACROSS THE FLOW TUBE, THE ENDS OF THE SUCTION TUBE EXTENDING AT LEAST TO THE OUTSIDE OF THE FLOW TUBE, SAID SUCTION TUBE PRODUCING IN THE FLOW TUBE AN INCREASING-DECREASING CONSTRICTION OF FLOW, AN OPENING IN THE WALL OF THE SUCTION TUBE DOWNSTREAM OF THE GREATEST CONSTRICTION OF FLOW, AND A LONGITUDINAL PARTITION DIVIDING THE SUCTION TUBE AND DIVIDING SAID OPENING, PROVIDING SIDEWISE ARRANGED, SEPARATE PERIPHERAL OPENINGS IN THE SUCTION TUBE, SAID PARTITION WITH THE SUCTION TUBE FORMING CHANNELS IN THE SUCTION TUBE LEADING FROM SAID SEPARATE PERIPHERAL OPENINGS TO OPPOSITE ENDS OF THE SUCTION TUBE; SAID CONSTRICTION OF FLOW PRODUCING A LOW PRESSURE AREA, RESULTING IN FLUID BEING DRAWN THROUGH THE SUCTION TUBE INTO THE FLOW TUBE. 